Alright, so I have a serpa holster for my glock 19 and it's my favorite holster. I just got a Serpa for a Sig Sauer 226/220. First thing I noticed when I opened it was that there was this little annoying piece of plastic in there that is rattling like CRAZY. I'm looking at my glock 19 holster and it's not there. Is this because it is a retention spring to accommodate railed and non-railed handguns? Can I just rip it out? I don't have a rail on my 220. Anyone else know what I'm talking about?